学院管理系统（mysql版）

需求

用户角色，讲师＼学员，用户登陆后根据角色不同，能做的事情不同，分别如下

讲师视图

　　管理班级，可创建班级，根据学员qq号把学员加入班级

　　可创建指定班级的上课纪录，注意一节上课纪录对应多条学员的上课纪录，即每节课都有整班学员上，为了纪录每位学员的学习成绩，需在创建每节上课纪录是，同时为这个班的每位学员创建一条上课纪录

　　为学员批改成绩，一条一条的手动修改成绩

学员视图

提交作业

查看作业成绩

一个学员可以同时属于多个班级，就像报了Linux的同时也可以报名Python一样，所以提交作业时需先选择班级，再选择具体上课的节数

附加：学员可以查看自己的班级成绩排名

表结构

学院管理系统（mysql版）

部分代码

from sqlalchemy import create_engine,Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import ForeignKey,Table
from sqlalchemy.orm import relationship


############创建数据表结构######################3
# 创建实例，并连接work库
engine = create_engine("mysql+pymysql://root:@localhost/home_work?charset=utf8")
Base = declarative_base()  # 生成orm基类

# 班级与讲师的对应关系表
teacher_m2m_class = Table("teacher_m2m_class",Base.metadata,
                          Column("teacher_id", Integer, ForeignKey("teacher.teacher_id")),
                          Column("class_id", Integer, ForeignKey("class.class_id")),
                          )

# 班级与学生的对应关系表
class_m2m_student = Table("class_m2m_student",Base.metadata,
                          Column("class_id",Integer,ForeignKey("class.class_id")),
                          Column("stu_id", Integer, ForeignKey("student.stu_id")),
                          )

class Class_m2m_Lesson(Base):
    '''班级和课节对应表'''
    __tablename__ = "class_m2m_lesson"
    id =  Column(Integer, primary_key=True)
    class_id = Column(Integer,ForeignKey("class.class_id"))
    lesson_id = Column(Integer, ForeignKey("lesson.lesson_id"))

    classes = relationship("Class",backref="class_m2m_lessons")
    lessons = relationship("Lesson", backref="class_m2m_lessons")

    def __repr__(self):
        return "%s %s" % (self.classes,self.lessons)

class Study_record(Base):
    "上课记录"
    __tablename__ = "study_record"
    id = Column(Integer,primary_key=True)
    class_m2m_lesson_id = Column(Integer,ForeignKey("class_m2m_lesson.id"))
    stu_id = Column(Integer, ForeignKey("student.stu_id"))
    status = Column(String(32),nullable=False)
    score = Column(Integer,nullable=True)

    class_m2m_lessons = relationship("Class_m2m_Lesson",backref="my_study_record")
    students = relationship("Student", backref="my_study_record")

    def __repr__(self):
       return  "\033[35;0m%s,%s,状态：【%s】,成绩：【%s】\33[0m"%(self.class_m2m_lessons,self.students,self.status,self.score)

class Teacher(Base):
    "讲师"
    __tablename__ = "teacher"
    teacher_id = Column(Integer, primary_key=True)
    teacher_name = Column(String(32), nullable=False, unique=True)   #唯一

    classes = relationship("Class", secondary=teacher_m2m_class, backref="teachers")

    def __repr__(self):
        return "讲师：【%s】"%self.teacher_name

class Class(Base):
    "班级"
    __tablename__ ="class"
    class_id = Column(Integer, primary_key=True)
    class_name = Column(String(32), nullable=False,unique=True)
    course =  Column(String(32), nullable=False)

    students = relationship("Student",secondary=class_m2m_student,backref="classes")

    def __repr__(self):
        return "班级名：【%s】"%self.class_name

class Student(Base):
    "学生"
    __tablename__ ="student"
    stu_id = Column(Integer, primary_key=True)
    stu_name = Column(String(32), nullable=False, unique=True)
    QQ =  Column(Integer(), nullable=False)

    def __repr__(self):
        return "学生名：【%s】"%self.stu_name

class Lesson(Base):
    "课节"
    __tablename__ = "lesson"
    lesson_id = Column(Integer, primary_key=True)
    lesson_name = Column(String(32), nullable=False, unique=True)

    def __repr__(self):
        return "节次名：【%s】"%self.lesson_name


Base.metadata.create_all(engine)

表结构